Oil burner



Dec- 6, 1927,

J' S- PECKER OIL BURNER Original Filed May ATTORNEY.

less flame when the same is turned down to' Patented Dec. 6, 1927.

PAUL BRWN, OF PHILADELPHIA, PENNSYLVANIA. j l f Y Iorri BURNER. f y

Apliiication flied .M'ay'za :1924, serial Nof. 715,303. Renewed october 25, 192i. v

'o This invent-ion relates to an oilburner for furnaces and the like. y 'lhe Object of the present invention is to improve the construction of oilburnersand equipped with means for effecting a pre-heat@- ing of the oil and air Without causing lthe oil to coke .within thev loil supply pipe and capable oft-horouglily mixing tli'eoiland :air and of producing a maximum combustion ofthe fuel.l y

It is also an Aobject'of the invention to provide an oil burner having means vfor 4producing an approximately horizontal spi-ral movement of the liame' and products of comf bustion for maintaining the saine a maximum length of time VvWithin. the vlower portion of ther furnace and therebysubject they Water jacket ofA `he latter to the Aintense'heat of the burner for a maximum length ofztime before permitting t'lie products ofy combustion to escape through'the fluefof the' furnace to the chimney. c y

Another object of the invention vis toarrange ythe oil supply pipe and the oilsupply means so that the oil Will be heated 'to anV even temperature prior to being miXed'vvith the air vwhereby a more uniform enable a burner to 'burn With ai clearsmokemaintain it lighted at;

periods when Vheat vide a burner, the operation of'which Will not be impaired should the burner either get4 out of level or not be properly levelled when the same is installed in a furnace.

Also it is an object ofthe invention to pro-` vide means for Acollecting and draining Oil' any excess of the supply of oil so that )they flatter will 'be 4saved and'may also bei-utilized for controlling the feed of oil to the burner.

-W'ithth'ese fand other objects in vievv., the

'invention consists in theconstructionr and novel 'combination and arrangement of parts hereinafter fully described, illustrated in tl'ie accompanying' drawings and pointedhout in lthe claims lieretoappended, it being'funderstood that various( changes in the` form, ...fr

proportion and kminor details of construction, Within lthe scope ofthe claims, may be resorted to Without departing from thespiri-t or sacrificing any yof the advantages ofthe invention. n i the drawings:k i f ff 1 vFigure jl' is a plan view partly 'broken away of an oil burner constructed in ac l cordance with this invention.

Figure 2 isa central transverse sectional` v view of the saine. l Y Y n l Figure 8 is a plan View of the combined distributor cap and baille, the 'varies of the lowerface thereof being;v illustrated in dotted p lines."v f o, *Y Figure 4 is a detail View of aportionlof the inner rsectional baffle plate; 'o Figure 5 isa'siniilarview offa portion of the outerlsectional 'baffle plate.

one :of the air regulating damper slides.

In the accompanying drawing in whichV -.Figure 6 is yaf'detailreverse pla'nvievvfofv l burner 'of circularform Vprovided at diamet--l i rically opposite points with depending cy-Y lindrica'l air inlets V2 and mounted in asheet metal pan 3 supported upon tubular barset as clearlyillustrated Fig.V 2: of the `draw- In installing the burner., the grate of the' v furnace 5, is removed andthe bars 4 are secure-d inthe furnace to, form supports for the pan 3=Which`ifn practice, is designed to be filled aroundy the 4burner with asbestos;

'clay "orY :other suitable refractory materiali` i' The burner and the'. pan' are of circular fornito .conform to the configuration ofthe fur-v nace7 but the burner :and thepan maybe of ss i rectangularuoblong orotlier shapeto for the reception of a cap 12, provided with air inlet slots 13 which are controlled by va damper 14 consisting of adisk provided with openings 15 land mounted for rotary adjustment on a central stud 16 of the cap to cover and uncover the openings 13 so that air inlet openings 'of/the required size may be provided tofcontrol the inlet ofair into the T burner. The base is also provided with vertical vwalls 17, forming Abaflies and spaced from the sides of the dome substantially the width of the air inlet 2 and curved to conform to the configuration, of andarranged in parallelism vvith` the'sides of the dome for causing the air entering the inlets 2 to pursue a curved course in their passage fromv the air inlets to the center of the burner as indicated .by the arrows in Figs.- 1 and'2 of the drawings. The baffles17 by causing the air to take. a curved path around the burner insure a heating of the air before the same reaches the center of the burner and the baffles have their ends spaced v'apart at -diametrically opposite points to Vprovide entrance spaces for theair.' Thecenter of the base formsa pocket or reservoir which is adapted .to contain cold air so that any cold s air will remain in the pocket at the base and the warm air will pass upward to mix with the oil as hereinafter fully explained.

The dome 9 tapers upwardlyand the walls are curved upwardly and'inwa'rdly as clear-V ly shown in Fig. 2 ofthe drawing. The top 18 of t-he dome. is of annular formation to provide a. central opening and it is concavo convex in cross section to present an upper trough shaped -or annular.l concave face. This annular trough shaped top which'may ofcourse, be rectangular or other shape in plan View to'conform to the shape of ya furnace, is provided at its inner portion with an oil groove 19, in which the oil drops and which also constitutes a starting cup when l 'l lighting theburner. The-top of the dome clearly shown in Fig.j2 of the drawing.

is provided at'its lower facewith a rib 20 which forms av shoulder to iitagainst the curved walls 17 at thelinner face thereof as The air passes upwardly at the center of the base and through Aa Vnarrow annular space or passagebetween the inner edge of the top o f the dome Iand a lower substanwith a central polygonal tially inverted conical deflector 21 which is,

ing r24 into which is screwed the inner vend of an oil supply pipe 25. `The oil supply pipe 25 extends vertically through one of -theair inlets and is provided with a horizontal approximately circular portion 26 extending nearly around the burner and terminating in a substantially Lr-shaped drop bend 27. The approximately L-shaped drop A-bend 27 is mounted upon a pedestal 28 formed integral with the base of the burner.

and disposed `radially thereofvand pierced by bolts 30, whi'ch fasten brackets 31 to the pedestal.v The brackets receive "the drop rbend and hold the oil supply pipe rigidly in position in the burner.

n The oil which may have a gravity or other feed passes upwardly through the vertical portion of the. oil supply pipe and enters the-horizontal circular portion andthen vpasses through the drop v bend into a vaporizing space or chamber 31 between the lower conical deflectorand the upper conical portion of thev combined distributor cap yand balile. The central inverted conical portion of the combined distributor cap and baffle is provided with curved vanes 32 extending upwardly and outwardly from the apex of the saidcentralf portion 22 and adapted to cause the oil to ,take a spiral course and spread in the space between the lower conical deflector and theuipperv conical section or portion 22.7 The conical defiector which maybe provided at its periphery with a vertical or nearly verticalface has grooves 33 formed therein to provide, outlet passages for the oil and these grooves terminate abovevthe inner annular groove 19of the top of the dome, so

saine and fitting in corresponding recesses 36, in the upper face of the deflector 21 as clearly shown in Fig. 2l of the drawings.

The distributor cap and baffle is provided wrench receiving boss 37 which withV the interlocking lugs 35 and recesses 36, will enable the inverted conical deflector to be readily screw-ed on or olf the inner upwardly extending threadj lap TIO

@damien of the VYou Supply pipe. The recesses .33 are also adapte/dpto receive a suit' able tool to enable the conical deflector 21 to bescnewedion or o they threaded end `of the 4oil ysupply pipe independently :of the ybaille 23, and this distributor cap and battle may betreadily'lifted on .the lower conical .def Hector 4to aord access to the burner..

.Y lAfter the burner Ahas been started, the heat will Vaporize the oil as'it is;y discharged intofthe groove 19, and the oil vapor will thoroughly inx` with the air entering the mixing space between the .top of the :dome and the distributor cap andy bailie. .'Inorder toeatfordfan ample supply of heated fair to the'oil'vapor to produce complete combus tiem-,the top of the 'fdoniesprovided with slots 38 arranged rin-annular vsets orv series which are located-atdfferent distances from thecenterof :the burner and which are *.d-s

'posed-in overlapping :or staggered relation, so that acomplete circle of ascending heated air will bev afforded for .ca-using combustion of the fuel vapor. The. :topof the dome .is

also provided with upwardly'projecting ples 39;.ada1pted Ato discharge heatedair into the space between the dome andthe dist-rile-l ucor .cap `and baffle vto .cooperatefwith the air admitted through thes'lotsand .through the passage around the conic'aldeflector in prof' Vdzucng vcomplete combustion of the fuel por. krAny number lof the slots and nipples may of course be J.provided and 'the .size :and number will be approportionedfbythe char-` acter and capacity ofthe burner, .so as'to ab ford a maximum combustion of the fuel:

The distributor cap and fbaile plate is proV vided at its. lower face `beyond its 4.central conical-portion with :curved radial venes 40 extending from `the flange 34ste 'the' peripl-l#V ery of thedistriburtorc'ap and bafle'and adapted* to 'produce a circular swirl-ingfrmo-` tion of the flame and "products of comlbns` tion to cause the sameto linger or "dwell at the lower portion of .the furnace and lthereby retain the flame and products of combustion a 'maximum 'length-ottime within the lower portionof V.the :turnace,' and thereby subject the kwater jacket l`oit' the furnace Vto 'a maxi# mum heating eifec't of the burner. f ',lhi's'vre-Y tarding or holdin-g back `oi the' produ-cts of combustion isy also .assist-ed -by injnergand outer parallel batlies 41 and 42-whic`h are. mounted upon and extend' above the distributor cap andlballe 23. vThe ballles 4l and 42 are preferably sectional as shown and the inner-baille 41, which is seated ina recess'of a-'rib -43, of the 'distributor cap and baille consists of a. lower cyl'indric-:al portion 'and an 'upper flared. portion while the Aouter baille Vl-Qis of approximately truncated conical for" mation forming an inclined wall extending upwardly and inwardly from the walls of the furnace over the upper Vedzgf'eofthe distributor'plate and: baille to a point within a short distancefof `the angle ,iormed'bthe upper and lower portions ofthe inner atll.

v"lhe inner` ,and `outer :bellies farespaoed a' short distance from each other to permit the upward passagesl of: fthe yproducts of oom- .bustion and the liared or inclined upperpor- TIo Vtiongont the inner bailelel directs or deflecs l the products .of .combustion .outwardly'to cause `the, same to nnpinge against the. walls of :the furnace 'in :their up-ward passage to yidedyat its inner side with arlnsflet,l which are notched atetheir lowercnds to lit the peripheral edge of 4the distributor cap and baille upon which `theouter battle is seated.

The inn-er and outer 'battles are removable andY may be readilyftalren ott with the distributor cap and baiie .for cleaning the burner. e The top of the dome lat the louter trough portion is .provided with a drainpipe 4.5 which is adapted to. :conduct away excess the smoke flue.. The outer balile 42 is pnt 1 eiland prevent :the saine from oyerllowing .the trough in .thetopof thedorne., lIn prac,- .tice', the drain`pi1pe 45 will be oonnectedby a pipe 416 with .suitable .means for :cntting'oi .the flow of'fthe .oil -to :the burner whenfthere.

a certain amount of excess, or io'verow :so .that vshould the burnerwhe-n iturnedjlow bel come extinguished the lcontinued liow :ofthe 'oil Vwill :operate .toca-1t :oit the :supply ofthe for .con-` ply pipe directly beneath and adjacent to the' top of fthedorne; The pipe is not `subjected tothe direct action ofthe flame and there is no liability of they -oil cokingwandcalzing on the interior of the oil supply pipe aind at the Sametime there s-uhcient heat the me' tallic Aparts of the burner to raise -the oil -,and

the .air to the `necessary Vtemperature for* proper combustion before the oil vapor and lair mix inthe .space between 'the .dom-e and the distributorcap. The airand the oiliya por mix as they.V enter Athe mixing space Iafnel the `liot gases in their travel radially of the mixingyspace pass through fa wallet1 heated air permitted byethe slotsSB to enter mixing space .and complete combustion Ais therebyassured :and thissupp'lyeo heated air -is augmented the `j ets `fromthe nipples 39. 'Thechannelstormed by the Yanes 321% well asv the `grooves inthe conical deflector may be readilycleaned byl lifting off -the'distri-buter cap; *Thesevanes 32 jas well asthe vanes 40 produce a circular or 'swirling kIno-4 the hot gases forincreasing length of timein in a proper level condition 'when installed,

vertical adjusting -screws its eectiveness will not be impaired.

The space between the dome and theV generating or vaporizing device formed'byv the deilector and the centralpor'tion of the distributor cap,rmay be'vvaried'by Vmeans of through the bottom of the base and having their upper en'ds arranged in openings of :lugs 49 formed integral with' lthe vertical walls or partitions of the base and located at the'upper edges thereof and extending inwardly from the said walls or partitions as clearly shownin'Fig. `1 of the drawing.V vThe screws project below thel base as illustrated in Fig. ,v2 andare adapted to be adjusted for lraising and'lowering the-dome. The said screws 'are preferably four in number, two Vbeing arrangedat the inner faces 'of the said vertical walls or partitions andV the adjustment is effected prior to th-e tightening of the bolts 11,.which secure the dome to the base; After the desiredl adjustment of the dome has been madeto provide a cir'- cul'ar `'airspace aroundth-e detlec'tor '21, the bolts 11 are. thentight'ened and the dome is rigidly secured to the base. The upwardly 'extending walls or partitions and the shoulders of the Vdome against lwhich theupper edges of the partitions or walls fit permit this vertical adjustment within certain limits Awit-hout in any way breaking the air chamber in t-h-e casing formedbythe dome and the base. vThe vaporizer ory generator device is formed by the defiector 2l andthe central inverted conical portion of the distributor cap and provides the vaporizing chamber 31 Vfor vaporizing the oil' to Vconvert the sameinto either afvapor or gas, previousto `mixing with the air the space 31 between the deflector 21 and the central inverted conical portion ofthe cap is designed primarily forand operates as a vapOriZer.

It vwill be seen that the .casing formed by the dome and-'the' base constitutes an s air heating chamber and also incloses the oil supply pipe, and-that one ofthe .air Vports is-.utilized in bringing the cold oil from the exterior ofthe casing into the same to heat -the oil before introducing it into the vaporizing and generating device and the heating of thev oil will greatly facilitate the How of the samein its yupward movement into the said device. The'location ofthe oil pipe within the casing beneath the dome lprotects `the oil pipe yfrom dir-ect contact with the flame of the burner andthe oil pipe whilel being heateddoes not come in contact with the said flame thereby eliminating baking and coking of the oil inside the pipe.l The loil as it fiows upwardly in the vaporizing and generating device comes in' contact with thefdistributor. cap which, afterthe burner 48 Y extending j lhas been started, becomes highly" heated due lboth to the conduction of heat by the metal of the distributor cap and also by the heat conducted by the baiies or flanges depending from the lower'convex face of the said cap. The oil within the vaporizing. and distributing device spreads out into a circular vflow Y escape and mix with the fuel vapors and the said air entering thecasingis caused to take a curved passage around the same and there are no cross currents of air that can possibly interfere with the passage of the air varound thev casing' and the heating 'of the air before it leaves they air-chamber. l The central opening through which the oil disv tributing and vaporizing device projectsis unobstructed by projections and a uniform draft. of air is permitted to pass through the spacebetween the distributor cap and the dome.v` By the arrangement of air ports between the inner and outer edges of the top ofthe dome, no vapor or partially con-v sumed oil is permitted to escape'from the burner without being broughtv into contactl with a sufficient supply of oxygen "to produce complete'combustion. The heavy rim orthickened inner .edge of the dome kat the central opening serves to hold a relatively.v

large amountof lheat andas the air impinges against the enlargedy inner edge 0r ros innerv rim, it will be clear that the temperal tu-re ofthe air will be raised considerably just prior to the mixing of the air with the fuelfvapor.

Also,the'thickened top ywall of the air dome and itslincreased,capacityl forholding heatserves to raise the temperature ofthe air within the casing at the; top of the dome'and around the oil pipe, which is arranged immediately beneath the top` of the dome. Y WVhat is claimed is: .f f

. 1. A burner including a base having an air inlet, 'a dome mounted `upon, the base andy provided in the top with an opening, a superimposed distributor cap 'spaced from the opening to form an air passage and provided with means for discharging fuel adjacent the said/passage to cause the same to mix with air,l said dome being provided beyond the said opening with openings arranged to permit an upward How ofL air., f 2. A. burnerV including a `base having an airv inlet, a dome mounted upon the base and Losanna provided thetop with an opening, a vsuperimposed 'distriltiutor` cap spacedf from the opening to form an air passage and provided with means for discharging fueladjacent the said passage to cause the same to mix with air, said' dome beingpiovid'ed beyond the said opening-y with openings arranged; to perLY mit an upward' flow of' air, said openings bev ing arranged to produce acontinuous wall'lv of upward' flowingl air in the space between Ythe `'dome and the distributor cap.y

3'. A burner including a base having air inletsV and provided with means. for controhy ling the passage of air through the same, a dome mounted upon the base and coopera ating with the same toform an air chamber,

walls extend-ing from` the, base to the domein. f spaced relation with the sides of the latter togprovide air: passages, a superimposed dis-g tribu-torl cap spaced from the dome to form an-.airA outlet and to provide a mixing space between the cap and the dome,.saidf cap being provided! with a fuel passage discharging atv the' spacebetween the capv and the dome, and means for supplying fuelto the distributor CaP- a Y 4l." A burner including a base having a central pedestal, a dome mount-ed on the base vand cooperating therewith top form an 'air chamber said dome beingprovided with an fuelipipe being also providedqwith abranchor portionrmounted upon thepedestalf and connecting the horizontal portion with-the passa 'es in' they distributor cap. Y,

-51 burner including Va base, a dome mounted upon the base and cooperating therewith to forni an airV chamber, saiddome being provided in its topwith an opening, a.

superimposed distributor cap spaced from the dome atthe-.opening to provide an air V`outlet and having fuel passages discharging.

at-the space, between the cap and the dome,

eef

the* latter ybeing providedv beyond the fuel passages with a plurality of slots and nipples for the 'discharge of air into thel said space,

means for supplying fuel to the disftributor'cap.

6, burner including a base having a bottom and -.walrls, a dome mounted upon the baseandconstitutingV a top wall for the same and formngan air chamber said vdome being vprovided:at'its top with an opening, a superimposed distributor cap spaced from the said opening to provide an air outlet thereat andl extending over the dome in spaced relation ytherewith to forni a mixing space and a comlbustion chamber and a mixing space beyondV extending. over the dome to forni a mixing Y lth-efouitlet,A said: capi being also provided with y fuel? passages Adischarging *ati the. air outlet, Y

and means forv supplying fuel to the said pas-u sages. and curved! vanes located in the mix-V ingfspace kto.` produce a circula-r swirling xnovement'oif the gases. K 1 i 7.l Ai burner including 'aV-base, having a bot.- tom and Walls, a dome mounted vupon the base Vand constituting a top Wall for thel same-and forming an air 'chamber and pro-.`

tributor cap of approximately concavol 0011.-. vex` form spaced from the domeA at the Said ope-ning to provide an air outletithereat and spacejand'a combustion chamber and havingv curved varies at its lower Vface to producer a curved swirling motion of the gases: resulting from combustion, and means for supply-I ing fuel to the space between the cap and thel dome. f

8; 5i-*burner4 includingfa base, a dome mount-edhupon the base and formingan airv chamber and having anv opening iin its top, a superimposed Y distributor i cap .provided with a central inverted Aconical portion, an

inverted conical deflector 'arranged at the l'central' portion ofthe cap and spaced from the dome atI the said opening to form an. air- `ol'itle-t, a passage, being` formed betweenthe 4deflector and the central' portion.y of the cap -v for fuel, means. 'for raising and lowering the means forsupplying'fuel' tothe said passage.. 91. A burnerl including-.a base, a dome surmounting the same: and having.- a central f opening, a distributor cap-provided with a and T having a depending iiange sur-rounding thesame, an approximately inverted conical deilfector arrangedf'within the said flange'and spaced from `the central conical portion vof the cap. and provided r'with peripheral grooves lforming fuel discharge 'passages, means for raising and 'lowering the dome to n varythe size of the said Vair outlet, and

`meansfor supplying fuel tothe space besa. c

Vdome to. vary the size f' the air outlet,'and

' cent-ral! inverted substantially conical portion tween the :deflect/or and the` central portion y of: the cap. c

10. .A'burner including'a base, a dome surmounting thefsame and having ak central opening, a distributorcap provided with a* centrali inverted Vsubstantially conicalportionV and' having a depending flange surrounding the same, an approximately inverted conical deflector arranged within the said i'langefl and spaced from the central conical portion groovesl form-ing fuel discharge passages, curved varies arranged' in .the space between cap toprovidel channels for fuel,and meansV for supplying fuel to the said space between the deflector and thecap; f

11.11A; burner including a base provided `of the cap and provided with peripheral Y the deflector and the central portion ofv the with a bottom and walls and having a dome yconstituting a top wall to Vform an air cham- 12. A burner including a base provided with a bottomfand walls having a dome constituting a top wall and surrounding theV base and provided with an opening, a substantially, concavo convex distributor cap spaced from the said opening to provide an air outlet thereat and extending over the dome to form amixing space and a combusvtion chamber and presenting a lower oonvex face, means for supplying fuel at the said space between the deflector cap and the dome, au outer inclined battle mounted upon ythe periphery of the deflector cap, and an inner bailie also mounted upon the deflector cap and consisting of a lower vertical portion andA an upper outwardly inclined or flared portion extending over the outer baiiie. 13.r A burner including a base provided with a bottom and walls having a dome constituting a top wall and forming an air chamber and provided with a central opening in its top, a superimposed deflector cap spaced from the dome to provide an air outlet thereat and extending over the domein spacedrelation thereto to form a mixing space anda combustion chamber, meansA for discharging fuel at the said space and means for producing a 'circular or swirling motion of the gases formed byV combustion in their outward passage through the said space.l

14. Aburner including. a base providedV with a bottom and walls having a domecsonf stituting a top wall and forming an airy chamber and provided with a central opening in its top, a superimposed deflector. capl yspaced from the dome to provide anair outlet at the top opening and `extending over the dome to form a mixing space and a combustion chamber, means foredischarg-v n ing fuel at'the said space and means for producing a circular or` swirling motion of the gases formed by combustion in their outward passage through the said space, and means for producing upward currents of hot air across the said space yand at an angle to the direction of movement of the said gases.

15. A burner including arbase provided with a bottom and walls having a dome constituting-fa top wall and forming an air chamber and provided with a central opening in its top, a superimposed delector cap spaced from the dome Vto provide an air outlet Yat the opening and extending over f the dome to form a mixing spaceand a combustion chamber, means for discharging fuel i at the said space and meansfor producing a circular or swirling motion of the gases. formed by combustion in their outward passage through the said space, and means for producing upward currents of hot air across the said spacev approximately at right angles to the direction of movement of the said gases Vand extending substantially around the burner. Y

16. A burner including a casing forming an air chamber-and comprising a base pro-L vided with walls and having air inlets at the bottom and a dome mounted upon the base .and constituting a top wall and having a central outlet opening at the top, a distributor cap extending over and arranged in spaced relation with the dome to form a mixing space and a combustionchamber and having an oil distributing and vaporizing device spaced from vthe dome at the said central opening to provide an air passage, i

and means for adjusting one of the said parts towards the other tovary the size ofv the said air passage. n

17. A burner including a casing forming an air chamber and comprising a base provided with walls and having air inlets at the bottoni and al dome mounted upon the base and constituting a top wall and having a central outlet vopening atv the top,

a distributorv cap arrangedv yin spaced relation with the dome and having an oil dis-V tributing and vaporizing device spaced from the dome at the said central opening to provide an air passage, vertical screws mounted in the casing and engaging the;

dome at the underside thereof for raising yand lowering the dome to vary the size of the said air passage.

18. A burnerincluding a casing forming an air chamber and comprising a base havmounted upon the base and having a cendonie to form a mixing space and a combustion chamber and having an oil distributing and vaporizing device spaced from the dome at the said central opening to provide an air passage, vertical vwalls or partitions rising from the base and arranged in overlapping relation with the dome for causing a circulation of air around the casing, said Walls or partitions being provided at their ing air inlets at the bottom and a domeV .tral outlet opening at the top, a distributor cap arranged in spaced relation withl theV upper portions with projecting lugs and v adjusting screws piercing the base and mounted in the said lugs and engaging the underside of the dome for raising and lowering the same to vary the .size of the 'said air passage. f

19. A burner including a casing forming Y an air chamber and comprising a .base having air inlets at the bottom and a dome mounted upon the lbase and provided With.v a Vcentral opening at the top7 a distributor cap spaced from the dome and having an oil distributing and vaporizing device at the said central opening and spa-ced from the dome to provide an airpassage, said dome being depressed to provide an oil receiving trough, a drain pipe extending from the said trough7 a drain pipe section carried by the base and having a loose coupling with the said drain pipe to permit an adjustment of the dome, and means for. adjusting the dome to vary the size of the air passage be tween the` distributing and vapori'zing device and the dome.

20. A burner including a casing forming an air chamber and comprising a base provided With Walls and havingl air inlets Vat the bottom, and a dome mounted upon the base and constituting a top wall and hav-V ing a central opening at the top, a superimposed distributor cap extending over the dome and spaced fromthe same to provide `a mixing and combustion space and having Vlets thereof and provided 'With a curved portion extending around the' air chamber yadf jacent the top of the dome and connected With the said oil distributing and vaporiz- A ing device. v In testimony whereof l'have hereunto set my hand.

JOSEPH s. PECKER; 

